<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="exit">退出</el-button>
    </el-header>
    <!-- 主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="istrue ? '64px' : '200px' ">
        <!-- 折叠与展开 -->
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          unique-opened
          :collapse="istrue"
          :collapse-transition="false"	
          router
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="item.id+''"
            v-for="item in menuList"
            :key="item.id"
          >
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/'+subItem.path"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState('/'+subItem.path)"
            >
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 展示区 -->
      <el-main><router-view></router-view></el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  name: 'Home',
  data() {
    return {
      //左侧菜单数据
      menuList: [],
      // 定义字体图标
      iconsObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao',
      },
     istrue: false,
     activePath:''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    // 退出功能的实现
    exit() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 发送axios请求，请求侧边栏的数据
    async getMenuList() {
      const { data: res } = await this.$https.get('menus')
      if (res.meta.status != 200) {
        return this.$message.error(res.meta, msg)
      } else {
        this.menuList = res.data
      }
    },
    // 切换折叠和展开
    toggleCollapse() {
        this.istrue = ! this.istrue
    },
    // 保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath = activePath
    }
  },
}
</script>

<style lang="less">
.home-container {
  height: 100%;
}
.el-header {
  display: flex;
  justify-content: space-between;
  background-color: #373d3f;
  padding-left: 0 !important;
  align-items: center;
  color: #fff;
  font-size: 20px;
  div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #323743;
  .toggle-button {
      background: #4A5064;
      height: 20px;
      line-height: 20px;
      text-align: center;
      letter-spacing: 0.2em;
      color: #fff;
      font-size: 10px;
      cursor: pointer;
  }
  .el-menu {
      border-right: 0;
  }
  
}
.el-main {
  background-color: #e9edf0;
}
.iconfont {
  margin-right: 10px;
}
</style>